Cash? What is this "cash" you speak of?
Is it those silly little pieces of paper I used to carry in my wallet in the 1980s?
I'm kidding. Sort of.
I put $40 in my wallet, and it last for months, because I buy almost NOTHING with cash.
Everything goes on the credit card, because I get a tiny percentage back, and I am not forced to carry those pieces of paper around.
And, of course, that credit cart gets paid off in full every month. To not do so would be insane.
Interesting. I totally agree plastic is easier to transport and faster to use. But I can often save more than the 3-4% cash back I'd get with a normal credit card by offering cash. And I've got a few outstanding card balances that I am making minimum payments on because the returns on that money are greater than the interest being charged. Just interesting to see how different hacks work for different people in different places.
If you want to dick around "haggling" over every purchase, go for it.
Might be a good practice if you live in Pakistan. Albania, or Burma.
But in the USA, it's generally a waste of time.
Walmart probably isn't going to "knock 3%" off that $1 pair of Made in China undies just because you want to dicker 3rd world style. Home Depot isn't going to cut the price of the 2x4 from $3.97 to $3.82 just because you ask to see a manager to debate pricing.
And even if they did, is it really worth your time?
Yes, you will occasionally find some backwater gas station that offers "5 cents off" for cash. In that case, go ahead and pay cash. That's why I still carry some cash, but rarely spend it- because once in a blue moon, you'll find that place while travelling through Hooterville. But I would suggest that these sorts of places are a distinct and tiny minority of businesses in the USA.
I use the credit card for everything else.
And pay it off in full every month. Never pay a penny in interest, never pay a penny in postage.